#0: ffff888111bf98b8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182 #1: ffff88810176d088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154 #2: ffff888114697008 (kn->active){.+.+}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155 #3: ffff888123583190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #3: ffff888123583190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2736 ============================================= rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (0 ticks this GP) idle=92a4/1/0x4000000000000000 softirq=24520/24520 fqs=0 rcu: 1-...!: (1 GPs behind) idle=f9bc/1/0x4000000000000000 softirq=24761/24762 fqs=0 rcu: (detected by 1, t=12158 jiffies, g=17497, q=113 ncpus=2) CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted 6.12.0-rc6-syzkaller-00153-g237d4e0f4113 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 16 f2 41 fa 48 89 df e8 2e 6f 42 fa f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 d5 a0 36 fa 65 8b 05 b6 5c 12 79 85 c0 74 16 5b RSP: 0000:ffffc9000018fb00 EFLAGS: 00000246 RAX: 0000000000000016 RBX: ffff88811acbd218 RCX: 1ffffffff1f5e00e RDX: 0000000000000000 RSI: ffffffff8727f220 RDI: ffffffff8746ec80 RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff1f559c9 R10: ffffffff8faace4f R11: ffffffff872a8ee0 R12: 1ffff92000031f65 R13: 0000000000000001 R14: 0000000000000100 R15: 000000000003c40c FS: 0000000000000000(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffdd3b5dd0 CR3: 0000000117028000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [inline] __run_timers+0x6e8/0x930 kernel/time/timer.c:2419 __run_timer_base kernel/time/timer.c:2430 [inline] __run_timer_base kernel/time/timer.c:2423 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2439 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449 handle_softirqs+0x206/0x8d0 kernel/softirq.c:554 run_ksoftirqd kernel/softirq.c:927 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:919 smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Mem-Info: active_anon:25585 inactive_anon:0 isolated_anon:0 active_file:4346 inactive_file:16335 isolated_file:0 unevictable:0 dirty:28 writeback:0 slab_reclaimable:6105 slab_unreclaimable:67514 mapped:12026 shmem:201 pagetables:711 sec_pagetables:0 bounce:0 kernel_misc_reclaimable:0 free:1512725 free_pcp:1199 free_cma:0 Node 0 active_anon:102340kB inactive_anon:0kB active_file:17384kB inactive_file:65340kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:48104kB dirty:112kB writeback:0kB shmem:804kB writeback_tmp:0kB kernel_stack:4072kB pagetables:2844kB sec_pagetables:0kB all_unreclaimable? no Node 0 DMA free:15360kB boost:0kB min:20kB low:32kB high:44kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 2696 6597 0 Node 0 DMA32 free:2775592kB boost:0kB min:4240kB low:7000kB high:9760kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2779092kB mlocked:0kB bounce:0kB free_pcp:3500kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 3901 0 Node 0 Normal free:3259948kB boost:0kB min:6140kB low:10132kB high:14124kB reserved_highatomic:0KB active_anon:102340kB inactive_anon:0kB active_file:17384kB inactive_file:65340kB unevictable:0kB writepending:112kB present:5242880kB managed:3995068kB mlocked:0kB bounce:0kB free_pcp:1296kB local_pcp:656kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15360kB Node 0 DMA32: 4*4kB (M) 1*8kB (M) 5*16kB (M) 4*32kB (M) 3*64kB (M) 3*128kB (M) 3*256kB (M) 2*512kB (M) 2*1024kB (M) 3*2048kB (M) 675*4096kB (M) = 2775592kB Node 0 Normal: 11*4kB (UME) 72*8kB (UME) 408*16kB (UE) 14*32kB (UME) 178*64kB (UME) 234*128kB (UE) 103*256kB (UME) 48*512kB (UE) 26*1024kB (UE) 6*2048kB (UME) 762*4096kB (M) = 3259948kB Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB 20882 total pagecache pages 0 pages in swap cache Free swap = 124996kB Total swap = 124996kB 2097051 pages RAM 0 pages HighMem/MovableOnly 399671 pages reserved